Power mechanism



Oct. 25, 1927. ,6 6, 65

R. G. THOMPSON ET AL POWER MECHANI SM Filed March 50. 1927 Figdl Patented Oct? 25, I927.

UNITED STATES PATENT OFFICE.

RUSSELL G. THOMPSON AND onns'rnn w. 0311mm, or nocnns'rnn, NEW YORK,- as- SIGNORS, FY MESNE ASSIGNMENTS, TO NORTH EAST ROCHESTER, .NEW YORK, A- COBPORATION OF NEW YORK.

APPLIANCES, INC. Oil

rowan MECHANISM.

Application filed March 30, 1927. Serial No. 179,629.

' This invention relates to power-mechanism for actuating the drive shaft of a calculating machine. It is customary to use an electric motor for this purpose, connected with the drive shaft through gearing whichis adapted to reduce the 'rotative speed and change-the direction of rotation as required. 4 The object of the invention is to combine the motor, the-gearing, and a part of the controlling means in a single assembly, with the gearin enclosed in a housing, this assembly being attached to and removable showing particularly the control. members of the gearing, and ig. 4 is an elevation of the power mechanism, looking from right to left in Fig. 1.

The invention is illustrated as applied to a calculating machine of a well-known type, and specifically to the machine known as the Monroe calculating machine. In such a machine there is a casing 5 which encloses a frame havin side members 6, of which one is shown in ig. 1. J ournalled on the frame members, near the rear of the casing, is a horizontal drive shaft 7, which may be rotated either manually or by power. This drive shaft carries a series of actuators 8 which cooperate with a series of registering mechanisms 9, in a manner which is well known and need not be described herein. In the operation of the machine the drive shaft 7 must be rotated sometimes .in one direction and sometimes in the other, at a moderate speed. and where an electric motor is used for this purpose it is customary to interpose between the drive shaft and the motor an epicycloidal gearing having provision both for reducing the rotative speed between the drive shaft and the armature shaft of the motor, and for reversing the respectively, with suitable stop direction of rotation of the drive shaft while the armature shaftrotates continuously in the same direction. The present invention does not relate to the construction and mode of operation of the gearing as such, but is directed to simple,'compact and convenient means forenclosing and supportingthe gearing and the motor, for "applying them detachably as a unit to the frame of the calculating machine, and for interconnectin the controlling means of the gearing with the appropriate member of the calculating machine.

The electric. motor 10, which is preferably of the enclosed type, is connected rigidly,

and preferably integrall with a gear housing 11, and the end of t is housing is closed by a removable end plate 12 secured in place by screws 13. The end plate is provided with perforated lugs 14, that receive screws by which the entire assembly, including motor, housing and end plate, is secured de tachably to the frame'member 6 of-the machine. The gearing 15' is. enclosed within the housing, and thus constitutes part of a readily detachable and self-contained assembly with the motor.. The housin provides effective means for enclosing% cant for the gearing.

The armature shaft of the motor is connectedwith one end of the gear train, while a short driven shaft 17, in axial alignment with the armature shaft, is connected with the other end of the gear train and jourubrialso nalled in the end plate 12. The power mech- Y anism is mounted u on. the frame of the machine with the driven shaft 17 in axial alignment with the drive shaft 7, and these two shafts are interconnected by a simple coupling 18, of which the membersma be disengaged'by merely withdrawing one rom the other when the power mechanism is removed from the machine.

The details of.construction of the gear train are not described herein, as it may be of any ordinary or well-known form, but, is customary in such gearing, the direction of rotation is controlled by arresting alternatively two rotativ'e members,'such as the members 19 and 20 shown particularly in Fig.v 3. Each of these-members is provided with radial arms or detents that cooperate, members which are thrown alternatively into operacrate with the stop members 19 and 20 tion according to the direction of rotation which is required. For this purpose the calculating machine is customarily provided with a manually operable lever 21, pivoted at 22 upon the frame 6. 7

In order to interconnect the lever 21 with the gearing enclosed within the removable housing 11, the housing is provided with an offset portion 23 in which a short rock-shaft 24 is journalled. This rock-shaft carries arms 25 and 26, and u on these arms s rin controlled stop lugs 2 and 28 are 'sli ing y supported, these lugs being adapted to cooprespectively. The stop lugs are thrown alternatively into operative position by rocking removed as a unit without disengaging any other fastening means, since the coupling 18 and the described connections between the lever 21 and the rock-shaft 24 may be separated by the mere operation of Withdrawing the power mechanism. The parts may berestored to operating position with equal facilit a The invention claimed is:

The combination, with acalculating machin comprising a frame and a drive-shaft journalled thereon, of reducing and reversing gearing having a driven shaft, a housing enclosing the gearing, a motor rigidly attached to and supported by said housing and with its shaft connected with the gearing to drive the same, means securing said housing removably to the frame of the machine, with the driven shaft in alignment with the driveshaft of the machine, coupling means connecting said shafts, a gear-controlling member movable within the housing, and means,

for moving said member, e'xtendin to the outside of the housing and coopera le with a control-member of the calculating machine.

RUSSELL G. THOMPSON. CHESTER W. CRUMRINE. 

